Accession Number:

AD0726548

Title:

Normal Impact of an Infinite Elastic-Plastic Beam by a Semi-Infinite Elastic Rod.

Descriptive Note:

Technical rept. Feb 70-Mar 71,

Corporate Author:

BROWN UNIV PROVIDENCE R I DIV OF ENGINEERING

Personal Author(s):

• Ranganath,S.
• Clifton,R. J.

Report Date:

1971-05-01

Pagination or Media Count:

70.0

Abstract:

Solutions are obtained for the problem of normal impact of an infinite elastic-plastic beam by a semi-infinite elastic rod. The effects of rotatory inertia and shear deformations are included in the equations governing the motion of the beam. A strain rate independent model based on concepts similar to those employed in quasi-static plasticity is used to describe material behavior. The interaction between moment and shear force is included. A strain hardening criterion is used based on the quasi-static moment-curvature relation for pure bending. Strain-time profiles computed using this theory agree reasonably well with those obtained in experiments on aluminum beams. The computed solutions are also compared with predictions based on a rigid perfectly plastic beam theory. Author

Descriptors:

• (*BEAMS(STRUCTURAL)
• IMPACT SHOCK)
• (*RODS
• IMPACT SHOCK)
• SHOCK(MECHANICS)
• MECHANICAL WAVES
• LOADS(FORCES)
• STRAIN HARDENING
• BENDING
• ELASTIC PROPERTIES
• DEFORMATION
• EQUATIONS OF MOTION
• PLASTIC PROPERTIES
• ALUMINUM ALLOYS

Subject Categories:

• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE